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The changed HTML will not work since you are passing too many parameters.

Secondly, because you have some php in there, I will assume some dynamic creation. Set the 2 seperate checkboxes apart from your list and do not give them a name and pass the names of the set you want to change. I think it should work like this.

I changed everything in bold: I changed the JavaScript and the HTML. The JavaScript now takes two parameters. I had to do this because "this" still needs to be passed to the function in order for the function to access oElement.form. So the way you suggest doesn't work.